
All creatures get -1/-1 until end of turn.
Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)
Mephitic Vapors has 3 printings, first in Guilds of Ravnica (2018). EDHREC ranks it #21,312 among Commander cards. It appears most in Maha, Its Feathers Night decks (655 on EDHREC). It has 4 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.